diff --git a/dom/public/base/nsIDOMWindow.h b/dom/public/base/nsIDOMWindow.h
index 8a3d9466d4bf..32b45295f96a 100644
--- a/dom/public/base/nsIDOMWindow.h
+++ b/dom/public/base/nsIDOMWindow.h
@@ -26,6 +26,7 @@
 #include "jsapi.h"
 
 class nsIDOMNavigator;
+class nsIDOMElement;
 class nsIDOMDocument;
 class nsIDOMScreen;
 class nsIDOMHistory;
@@ -136,6 +137,8 @@ public:
 
   NS_IMETHOD    SetInterval(JSContext *cx, jsval *argv, PRUint32 argc, PRInt32* aReturn)=0;
 
+  NS_IMETHOD    CreatePopup(nsIDOMElement* aElement, nsIDOMElement* aPopupContent, PRInt32 aXPos, PRInt32 aYPos, const nsString& aPopupType, const nsString& aPopupAlignment)=0;
+
   NS_IMETHOD    Open(JSContext *cx, jsval *argv, PRUint32 argc, nsIDOMWindow** aReturn)=0;
 
   NS_IMETHOD    OpenDialog(JSContext *cx, jsval *argv, PRUint32 argc, nsIDOMWindow** aReturn)=0;
@@ -197,6 +200,7 @@ public:
   NS_IMETHOD    ClearInterval(PRInt32 aTimerID);  \
   NS_IMETHOD    SetTimeout(JSContext *cx, jsval *argv, PRUint32 argc, PRInt32* aReturn);  \
   NS_IMETHOD    SetInterval(JSContext *cx, jsval *argv, PRUint32 argc, PRInt32* aReturn);  \
+  NS_IMETHOD    CreatePopup(nsIDOMElement* aElement, nsIDOMElement* aPopupContent, PRInt32 aXPos, PRInt32 aYPos, const nsString& aPopupType, const nsString& aPopupAlignment);  \
   NS_IMETHOD    Open(JSContext *cx, jsval *argv, PRUint32 argc, nsIDOMWindow** aReturn);  \
   NS_IMETHOD    OpenDialog(JSContext *cx, jsval *argv, PRUint32 argc, nsIDOMWindow** aReturn);  \
 
@@ -257,6 +261,7 @@ public:
   NS_IMETHOD    ClearInterval(PRInt32 aTimerID) { return _to ClearInterval(aTimerID); }  \
   NS_IMETHOD    SetTimeout(JSContext *cx, jsval *argv, PRUint32 argc, PRInt32* aReturn) { return _to SetTimeout(cx, argv, argc, aReturn); }  \
   NS_IMETHOD    SetInterval(JSContext *cx, jsval *argv, PRUint32 argc, PRInt32* aReturn) { return _to SetInterval(cx, argv, argc, aReturn); }  \
+  NS_IMETHOD    CreatePopup(nsIDOMElement* aElement, nsIDOMElement* aPopupContent, PRInt32 aXPos, PRInt32 aYPos, const nsString& aPopupType, const nsString& aPopupAlignment) { return _to CreatePopup(aElement, aPopupContent, aXPos, aYPos, aPopupType, aPopupAlignment); }  \
   NS_IMETHOD    Open(JSContext *cx, jsval *argv, PRUint32 argc, nsIDOMWindow** aReturn) { return _to Open(cx, argv, argc, aReturn); }  \
   NS_IMETHOD    OpenDialog(JSContext *cx, jsval *argv, PRUint32 argc, nsIDOMWindow** aReturn) { return _to OpenDialog(cx, argv, argc, aReturn); }  \
 
diff --git a/dom/public/idl/base/Window.idl b/dom/public/idl/base/Window.idl
index a3afbfa3eafe..2317e35309be 100644
--- a/dom/public/idl/base/Window.idl
+++ b/dom/public/idl/base/Window.idl
@@ -47,6 +47,11 @@
         void clearInterval(in long timerID);
         long setTimeout(/* ... */);
         long setInterval(/* ... */);
+
+		void createPopup(in Element element, in Element popupContent,
+					     in long xPos, in long yPos, 
+						 in DOMString popupType, in DOMString popupAlignment);
+
         Window open(/* ... */);
         Window openDialog(/* ... */);
       };
diff --git a/dom/src/base/nsGlobalWindow.cpp b/dom/src/base/nsGlobalWindow.cpp
index cd5a593c205a..2ed8c95a103d 100644
--- a/dom/src/base/nsGlobalWindow.cpp
+++ b/dom/src/base/nsGlobalWindow.cpp
@@ -1628,6 +1628,14 @@ GlobalWindowImpl::OpenDialog(JSContext *cx,
   return res;
 }
 
+NS_IMETHODIMP
+GlobalWindowImpl::CreatePopup(nsIDOMElement* aElement, nsIDOMElement* aPopupContent, 
+                              PRInt32 aXPos, PRInt32 aYPos, 
+                              const nsString& aPopupType, const nsString& aPopupAlignment)
+{
+  return NS_OK;
+}
+
 nsresult 
 GlobalWindowImpl::CheckWindowName(JSContext *cx, nsString& aName)
 {
diff --git a/dom/src/base/nsGlobalWindow.h b/dom/src/base/nsGlobalWindow.h
index f394643d38b1..b106cb76cf20 100644
--- a/dom/src/base/nsGlobalWindow.h
+++ b/dom/src/base/nsGlobalWindow.h
@@ -149,6 +149,10 @@ public:
   NS_IMETHOD    OpenDialog(JSContext *cx, jsval *argv, PRUint32 argc, 
                             nsIDOMWindow** aReturn);
 
+  NS_IMETHOD    CreatePopup(nsIDOMElement* aElement, nsIDOMElement* aPopupContent, 
+                            PRInt32 aXPos, PRInt32 aYPos, 
+                            const nsString& aPopupType, const nsString& aPopupAlignment);
+    
   // nsIDOMEventCapturer interface
   NS_IMETHOD    CaptureEvent(const nsString& aType);
   NS_IMETHOD    ReleaseEvent(const nsString& aType);
diff --git a/dom/src/base/nsJSWindow.cpp b/dom/src/base/nsJSWindow.cpp
index 035cdf08ece3..5c1e3981334f 100644
--- a/dom/src/base/nsJSWindow.cpp
+++ b/dom/src/base/nsJSWindow.cpp
@@ -27,6 +27,7 @@
 #include "nsIPtr.h"
 #include "nsString.h"
 #include "nsIDOMNavigator.h"
+#include "nsIDOMElement.h"
 #include "nsIDOMDocument.h"
 #include "nsIDOMScreen.h"
 #include "nsIDOMHistory.h"
@@ -41,6 +42,7 @@ static NS_DEFINE_IID(kIScriptObjectOwnerIID, NS_ISCRIPTOBJECTOWNER_IID);
 static NS_DEFINE_IID(kIJSScriptObjectIID, NS_IJSSCRIPTOBJECT_IID);
 static NS_DEFINE_IID(kIScriptGlobalObjectIID, NS_ISCRIPTGLOBALOBJECT_IID);
 static NS_DEFINE_IID(kINavigatorIID, NS_IDOMNAVIGATOR_IID);
+static NS_DEFINE_IID(kIElementIID, NS_IDOMELEMENT_IID);
 static NS_DEFINE_IID(kIDocumentIID, NS_IDOMDOCUMENT_IID);
 static NS_DEFINE_IID(kIScreenIID, NS_IDOMSCREEN_IID);
 static NS_DEFINE_IID(kIHistoryIID, NS_IDOMHISTORY_IID);
@@ -51,6 +53,7 @@ static NS_DEFINE_IID(kIEventCapturerIID, NS_IDOMEVENTCAPTURER_IID);
 static NS_DEFINE_IID(kIWindowIID, NS_IDOMWINDOW_IID);
 
 NS_DEF_PTR(nsIDOMNavigator);
+NS_DEF_PTR(nsIDOMElement);
 NS_DEF_PTR(nsIDOMDocument);
 NS_DEF_PTR(nsIDOMScreen);
 NS_DEF_PTR(nsIDOMHistory);
@@ -1344,6 +1347,75 @@ WindowSetInterval(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *
 }
 
 
+//
+// Native method CreatePopup
+//
+PR_STATIC_CALLBACK(JSBool)
+WindowCreatePopup(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
+{
+  nsIDOMWindow *nativeThis = (nsIDOMWindow*)JS_GetPrivate(cx, obj);
+  JSBool rBool = JS_FALSE;
+  nsIDOMElementPtr b0;
+  nsIDOMElementPtr b1;
+  PRInt32 b2;
+  PRInt32 b3;
+  nsAutoString b4;
+  nsAutoString b5;
+
+  *rval = JSVAL_NULL;
+
+  // If there's no private data, this must be the prototype, so ignore
+  if (nsnull == nativeThis) {
+    return JS_TRUE;
+  }
+
+  if (argc >= 6) {
+
+    if (JS_FALSE == nsJSUtils::nsConvertJSValToObject((nsISupports **)&b0,
+                                           kIElementIID,
+                                           "Element",
+                                           cx,
+                                           argv[0])) {
+      return JS_FALSE;
+    }
+
+    if (JS_FALSE == nsJSUtils::nsConvertJSValToObject((nsISupports **)&b1,
+                                           kIElementIID,
+                                           "Element",
+                                           cx,
+                                           argv[1])) {
+      return JS_FALSE;
+    }
+
+    if (!JS_ValueToInt32(cx, argv[2], (int32 *)&b2)) {
+      JS_ReportError(cx, "Parameter must be a number");
+      return JS_FALSE;
+    }
+
+    if (!JS_ValueToInt32(cx, argv[3], (int32 *)&b3)) {
+      JS_ReportError(cx, "Parameter must be a number");
+      return JS_FALSE;
+    }
+
+    nsJSUtils::nsConvertJSValToString(b4, cx, argv[4]);
+
+    nsJSUtils::nsConvertJSValToString(b5, cx, argv[5]);
+
+    if (NS_OK != nativeThis->CreatePopup(b0, b1, b2, b3, b4, b5)) {
+      return JS_FALSE;
+    }
+
+    *rval = JSVAL_VOID;
+  }
+  else {
+    JS_ReportError(cx, "Function createPopup requires 6 parameters");
+    return JS_FALSE;
+  }
+
+  return JS_TRUE;
+}
+
+
 //
 // Native method Open
 //
@@ -1690,6 +1762,7 @@ static JSFunctionSpec WindowMethods[] =
   {"clearInterval",          WindowClearInterval,     1},
   {"setTimeout",          WindowSetTimeout,     0},
   {"setInterval",          WindowSetInterval,     0},
+  {"createPopup",          WindowCreatePopup,     6},
   {"open",          WindowOpen,     0},
   {"openDialog",          WindowOpenDialog,     0},
   {"captureEvent",          EventCapturerCaptureEvent,     1},